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/*
* IS-IS Rout(e)ing protocol - isis_events.h
*
* Copyright (C) 2001,2002 Sampo Saaristo
* Tampere University of Technology
* Institute of Communications Engineering
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public Licenseas published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <zebra.h>
#include "log.h"
#include "memory.h"
#include "if.h"
#include "linklist.h"
#include "command.h"
#include "thread.h"
#include "hash.h"
#include "prefix.h"
#include "stream.h"
#include "table.h"
#include "isisd/dict.h"
#include "isisd/isis_constants.h"
#include "isisd/isis_common.h"
#include "isisd/isis_flags.h"
#include "isisd/isis_circuit.h"
#include "isisd/isis_lsp.h"
#include "isisd/isis_pdu.h"
#include "isisd/isis_network.h"
#include "isisd/isis_misc.h"
#include "isisd/isis_constants.h"
#include "isisd/isis_adjacency.h"
#include "isisd/isis_dr.h"
#include "isisd/isisd.h"
#include "isisd/isis_csm.h"
#include "isisd/isis_events.h"
#include "isisd/isis_spf.h"
/* debug isis-spf spf-events
4w4d: ISIS-Spf (tlt): L2 SPF needed, new adjacency, from 0x609229F4
4w4d: ISIS-Spf (tlt): L2, 0000.0000.0042.01-00 TLV contents changed, code 0x2
4w4d: ISIS-Spf (tlt): L2, new LSP 0 DEAD.BEEF.0043.00-00
4w5d: ISIS-Spf (tlt): L1 SPF needed, periodic SPF, from 0x6091C844
4w5d: ISIS-Spf (tlt): L2 SPF needed, periodic SPF, from 0x6091C844
*/
void isis_event_circuit_state_change(struct isis_circuit *circuit,
struct isis_area *area, int up)
{
area->circuit_state_changes++;
if (isis->debugs & DEBUG_EVENTS)
zlog_debug("ISIS-Evt (%s) circuit %s", area->area_tag,
up ? "up" : "down");
/*
* Regenerate LSPs this affects
*/
lsp_regenerate_schedule(area, IS_LEVEL_1 | IS_LEVEL_2, 0);
return;
}
static void circuit_commence_level(struct isis_circuit *circuit, int level)
{
if (level == 1) {
if (!circuit->is_passive)
thread_add_timer(master, send_l1_psnp, circuit,
isis_jitter(circuit->psnp_interval[0],
PSNP_JITTER),
&circuit->t_send_psnp[0]);
if (circuit->circ_type == CIRCUIT_T_BROADCAST) {
thread_add_timer(master, isis_run_dr_l1, circuit,
2 * circuit->hello_interval[0],
&circuit->u.bc.t_run_dr[0]);
thread_add_timer(master, send_lan_l1_hello, circuit,
isis_jitter(circuit->hello_interval[0],
IIH_JITTER),
&circuit->u.bc.t_send_lan_hello[0]);
circuit->u.bc.lan_neighs[0] = list_new();
}
} else {
if (!circuit->is_passive)
thread_add_timer(master, send_l2_psnp, circuit,
isis_jitter(circuit->psnp_interval[1],
PSNP_JITTER),
&circuit->t_send_psnp[1]);
if (circuit->circ_type == CIRCUIT_T_BROADCAST) {
thread_add_timer(master, isis_run_dr_l2, circuit,
2 * circuit->hello_interval[1],
&circuit->u.bc.t_run_dr[1]);
thread_add_timer(master, send_lan_l2_hello, circuit,
isis_jitter(circuit->hello_interval[1],
IIH_JITTER),
&circuit->u.bc.t_send_lan_hello[1]);
circuit->u.bc.lan_neighs[1] = list_new();
}
}
return;
}
static void circuit_resign_level(struct isis_circuit *circuit, int level)
{
int idx = level - 1;
THREAD_TIMER_OFF(circuit->t_send_csnp[idx]);
THREAD_TIMER_OFF(circuit->t_send_psnp[idx]);
if (circuit->circ_type == CIRCUIT_T_BROADCAST) {
THREAD_TIMER_OFF(circuit->u.bc.t_send_lan_hello[idx]);
THREAD_TIMER_OFF(circuit->u.bc.t_run_dr[idx]);
THREAD_TIMER_OFF(circuit->u.bc.t_refresh_pseudo_lsp[idx]);
circuit->lsp_regenerate_pending[idx] = 0;
circuit->u.bc.run_dr_elect[idx] = 0;
if (circuit->u.bc.lan_neighs[idx] != NULL) {
list_delete(circuit->u.bc.lan_neighs[idx]);
circuit->u.bc.lan_neighs[idx] = NULL;
}
}
return;
}
void isis_circuit_is_type_set(struct isis_circuit *circuit, int newtype)
{
if (circuit->state != C_STATE_UP) {
circuit->is_type = newtype;
return;
}
if (isis->debugs & DEBUG_EVENTS)
zlog_debug("ISIS-Evt (%s) circuit type change %s -> %s",
circuit->area->area_tag,
circuit_t2string(circuit->is_type),
circuit_t2string(newtype));
if (circuit->is_type == newtype)
return; /* No change */
if (!(newtype & circuit->area->is_type)) {
zlog_err(
"ISIS-Evt (%s) circuit type change - invalid level %s because"
" area is %s",
circuit->area->area_tag, circuit_t2string(newtype),
circuit_t2string(circuit->area->is_type));
return;
}
if (!circuit->is_passive) {
switch (circuit->is_type) {
case IS_LEVEL_1:
if (newtype == IS_LEVEL_2)
circuit_resign_level(circuit, 1);
circuit_commence_level(circuit, 2);
break;
case IS_LEVEL_1_AND_2:
if (newtype == IS_LEVEL_1)
circuit_resign_level(circuit, 2);
else
circuit_resign_level(circuit, 1);
break;
case IS_LEVEL_2:
if (newtype == IS_LEVEL_1)
circuit_resign_level(circuit, 2);
circuit_commence_level(circuit, 1);
break;
default:
break;
}
}
circuit->is_type = newtype;
lsp_regenerate_schedule(circuit->area, IS_LEVEL_1 | IS_LEVEL_2, 0);
return;
}
/* 04/18/2002 by Gwak. */
/**************************************************************************
*
* EVENTS for LSP generation
*
* 1) an Adajacency or Circuit Up/Down event
* 2) a chnage in Circuit metric
* 3) a change in Reachable Address metric
* 4) a change in manualAreaAddresses
* 5) a change in systemID
* 6) a change in DIS status
* 7) a chnage in the waiting status
*
* ***********************************************************************
*
* current support event
*
* 1) Adjacency Up/Down event
* 6) a change in DIS status
*
* ***********************************************************************/
void isis_event_adjacency_state_change(struct isis_adjacency *adj, int newstate)
{
/* adjacency state change event.
* - the only proto-type was supported */
/* invalid arguments */
if (!adj || !adj->circuit || !adj->circuit->area)
return;
if (isis->debugs & DEBUG_EVENTS)
zlog_debug("ISIS-Evt (%s) Adjacency State change",
adj->circuit->area->area_tag);
/* LSP generation again */
lsp_regenerate_schedule(adj->circuit->area, IS_LEVEL_1 | IS_LEVEL_2, 0);
return;
}
/* events supporting code */
int isis_event_dis_status_change(struct thread *thread)
{
struct isis_circuit *circuit;
circuit = THREAD_ARG(thread);
/* invalid arguments */
if (!circuit || !circuit->area)
return 0;
if (isis->debugs & DEBUG_EVENTS)
zlog_debug("ISIS-Evt (%s) DIS status change",
circuit->area->area_tag);
/* LSP generation again */
lsp_regenerate_schedule(circuit->area, IS_LEVEL_1 | IS_LEVEL_2, 0);
return 0;
}
void isis_event_auth_failure(char *area_tag, const char *error_string,
u_char *sysid)
{
if (isis->debugs & DEBUG_EVENTS)
zlog_debug("ISIS-Evt (%s) Authentication failure %s from %s",
area_tag, error_string, sysid_print(sysid));
return;
}
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